This makes for some pretty great fantasy, but is this actually possible? And is there any chance that variable-length seasons as portrayed in Game of Thrones could eventually happen on Earth?

The answer is yes. And in fact, there are at least five scientific explanations that can help explain what’s going on in the Seven Kingdoms.

[…]It’s important to note that the Earth’s axis of rotation is extremely stable. If it wasn’t, the Earth’s tilt would be very wobbly, resulting in inconsistent and unpredictable seasonal lengths like the ones portrayed in Game of Thrones.